ABB ETL600, Instruction Manual

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Revision: Language: Page:
A EN 2/7
1KHW001491-EN
1 General
In the ETL600 the Rx filter P4RX is tuned using the Rx tuning adapter P4LM, the Tx tuning adapter P3LL
and the HMI600. However before starting tuning, the filter programming jumpers must be set in
accordance with the programming tables, shown in the HMI600. Using HMI600, the P4LT generates the
test frequencies required for tuning P4RX.
2 Programming
The filter must be programmed with jumpers. With the jumpers, the mode of the coils (series or parallel
connection), the required capacitors and the required filter termination resistors are selected. Also the
amplifier gain is set by jumpers.
The required jumper settings for the P4RX board are generated by the HMI600 program, according to the
chosen center frequency and nominal bandwidth. To set the jumpers, the top shielding cover of the P4RX
board must be removed.
To remove the top shielding cover from the P4RX board: loosen the two mounting screws and carefully
pull-off the top cover. A screwdriver may be inserted in the slot adjacent to the screw to help lifting the
cover.
2.1 Steps for determining the required jumper positions
1. If not already done, switch on the power of the ETL600, start up the HMI600 on the PC, log on to the
local ETL600 using
equipment ID
0 and
Read & write access, Upload configuration
as well as
Upload status
enabled.
2. On the
Equipment
menu click
Tuning & testing
.
A warning message box appears, informing that the normal operation of the link will be interrupted.
3. Click
OK
to get the
Tuning & testing
dialog box.
4. Click
Tune Rx RF filter
to get the
Tuning Rx RF filter
dialog box and click
Default
to update the filter
center frequency f0 and bandwidth according to the configured Tx and Rx nominal frequencies and
nominal bandwidth (refer to the
Configuration
menu). If required, center frequency and bandwidth of
the filter can be changed in the
Tune Rx RF filter
dialog box. Once the filter has been tuned, in order
not to loose the filter settings, the
Default
button must not be pressed anymore.
)
Note: Once the filter has been tuned, in order not to loose the filter settings, the
Default
button must not be pressed anymore.
5. Check if the correct filter center frequency f0 and bandwidth is shown. If these values shall be
modified, select them from the drop down lists.
6. Place the jumpers according to the table shown in the HMI: “0” means no jumper, “1” means jumper
placed.
7. Click
Ok
to add the filter settings to the equipment configuration, to discard them click
Cancel
.
The jumpers are stored in a plastic (anti static) bag fixed to the PCB. Put the jumpers on the indicated
positions, with the open side of the jumpers on top.
Carefully check the jumper positions with the
HMI600 table, as wrong positioned jumpers may cause problems in tuning the filter
. A wrong
positioned jumper may not always be detected by the filter verification check!
Put the remaining (spare) jumpers back into the plastic bag for future use. Put the top cover back into its
place and fasten the screws. Now the filter is ready for tuning.